|Title:||Control of Pythium Root Rot of Vegetable Pea Seedlings in Soilless Cultural System||Other Titles:||腐霉菌引起設施豌豆苗根腐病之防治||Authors:||Yi-Sheng Lin
|Keywords:||Pisum sativum;Pythium aphanidermatum;P. ultimum;inoculum sources;disinfectant;calcium hypochlorite;control;豌豆;腐霉菌;感染源來源;消毒劑;次氯酸鈣;防治||Issue Date:||Dec-2002||Publisher:||中華民國植物病理學會||Journal Volume:||11||Journal Issue:||4||Start page/Pages:||221-228||Source:||植物病理學會刊||Abstract:||
This study was initiated to develop non-pesticide methods to control Pythium root rot of vegetable pea seedlings in a soilless cultural system. The disease was not prevalent when new seedling trays were used for growing pea seedlings. However, when the cultural trays were used repeatedly for the same purpose, mycelia and oospores of Pythium aphanidermatum and P. ultimum produced by the infected roots contaminated the trays and became an important inoculum source to cause severe root rot. Drying the used trays under sunlight for months or immersing the trays in a calcium hypochlorite solution (2,000 ppm) for 24 hours before planting was effective in preventing this disease. Incidences of the disease were drastically reduced from 60-80% to less than 10% and yields of pea seedlings averaged 772 g/tray to 212 g/tray when the used trays were pre-treated with calcium hypochlorite solution comparing to the non-treated controls during hot growing season.
本研究發展非農藥方法防治腐霉菌引起之設施豌膩苗根腐病。本病害在使用新育苗盤之農場並不嚴重，但重複使用會使罹病之豌豆根部污染育苗盤，而殘存其上病原菌(Pythium aphanidermatum和P. ultimum)之菌絲與卵抱子則成為重要感染源，因而引起嚴重的根腐病。將污染病原菌之育苗盤曝曬於陽光下數月，或將之浸泡於次氯酸鈣溶液(2000 ppm)，24小時，都可有效防治木病害。在發病嚴重之炎熱夏季，使用次氯酸鈣溶液的防治方法，可使豌豆苗根腐病之發病率由60-80%降綱10%以下，而旦每育苗盤的平均產量由212公克提高至772公克。
|Appears in Collections:||植物病理組|
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